1、Designation: F 290 94 (Reapproved 2005)Standard Specification forRound Wire for Winding Electron Tube Grid Laterals1This standard is issued under the fixed designation F 290; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers round wire up to 0.006 in.(0.15 mm) in diameter for use as electron tube grid lateralwi
3、nding wire.1.2 Five classes of wire are covered based on their tensileproperties (see 5.2 and 5.3).1.3 The values stated in inch-pound units are to be regardedas the standard. The metric equivalents of inch-pound unitsmay be approximate.1.4 This standard does not purport to address all of thesafety
4、concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E39 Test Methods for Chemical Analy
5、sis of Nickel3E 107 Test Methods for Chemical Analysis of ElectronicNickelE 129 Test Method for Spectrographic Analysis of Thermi-onic Nickel Alloys by the Powder TechniquesF16 Test Methods for Measuring Diameter or Thickness ofWire and Ribbon for Electronic Devices and LampsF 205 Test Method for Me
6、asuring Diameter of Fine Wire byWeighingF 288 Specification for Tungsten Wire for Electronic De-vices and LampsF 289 Specification for Molybdenum Wire and Rod forElectrical Applications3. Terminology3.1 Description of Terms:3.1.1 The following description of terms shall apply to therequirements spec
7、ified in Table 1:3.1.1.1 breaking strengthThe stress at which the speci-men breaks.3.1.1.2 elongationThe maximum percent of stretch in aspecimen of 10-in. (250-mm) gage length.3.1.1.3 tensile strength The ultimate strength of the ma-terial expressed either as grams per milligram per 200 mmlength of
8、wire or pounds per square inch.3.1.1.4 ultimate strengthThe maximum stress developedin a specimen.3.1.1.5 work loadThe difference between the yield loadand the ultimate load.3.1.1.6 yield strength The stress developed at 1 percentelongation when testing a specimen of 10-in. (250-mm) gagelength.4. Ch
9、emical Composition4.1 The wire shall conform to the requirements as tochemical composition as prescribed in Table 2.5. Tensile Properties5.1 The wire shall conform to the requirements as to tensilestrength, yield strength, working range, and elongation prop-erties as prescribed in Table 1 for the cl
10、ass of wire designated.5.2 The class designations for the nickel-titanium-magnesium alloy UNS N03300; the nickel-manganese alloyUNS N02211; molybdenum wire, and the nickel-molybdenum-iron alloy UNS N10001; are based on their tensile properties asfollows:5.2.1 Class IThe wire shall conform to elongat
11、ion prop-erties as specified in ranges in Table 1.5.2.2 Class IIThe wire shall conform to the followingtensile properties:5.2.2.1 Yield strength with a spread of approximately615 %, as shown in grams-force, minimum and maximum, inTable 2,5.2.2.2 Working range, as specified in Table 1, and5.2.2.3 Elo
12、ngation as specified in Table 1.5.2.3 Class IIIThe wire shall conform to the followingtensile properties:5.2.3.1 Yield strength with a spread of approximately610 %, as shown in grams-force, minimum and maximum, inTable 1.1This specification is under the jurisdiction of ASTM Committee F01 onElectroni
13、cs and is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved Jan. 1, 2005. Published January 2005. Originallyapproved in 1954 as B 290 54 T; redesignated F 290 in 1955. Last previous editionapproved in 1999 as F 290 94 (1999).2For referenced ASTM standards
14、, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Discontinued; see 1994 Annual Book of ASTM Standards, Vol 03.05.1Copyright ASTM Internatio
15、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.3.2 A larger working range as specified in Table 1, and5.2.3.3 Elongation as specified in Table 1.5.3 The class designations for tungsten wire are as follows:5.3.1 Classes IV and V Tungsten wire UNS R07005 s
16、hallconform to the tensile properties for both classes as prescribedin Table 3.TABLE 1 Tensile Properties for Nickel-Titanium-Magnesium Alloy (UNS N03300), Nickel-Manganese Alloy (UNS N02211),Molybdenum Wire, and Nickel-Molybdenum-Iron Alloy (UNS N10001) WireCLASS INoteWire supplied as Class I shall
17、 conform to the following elongation values as specified by range:Material Range Wire Diameter,in. (mm)Elongation,%Nickel-titanium-magnesium alloy (UNS N03300)and nickel-manganese alloy (UNS N02211) 1 All 8 to 162 All 14 to 223 0.003 (0.08) and under 20 and over4 Above 0.003 (0.08) 22 and overMolybd
18、enum 1 All 8 to 162 All 14 to 22Nickel-molybdenum-iron alloy (UNS N10001) 1 0.001 (0.025) 8 to 182 0.0015 (0.038) 18 to 323 0.002 (0.050) and above 25 and overCLASS IINoteWire supplied as Class II shall conform to the following requirements as to yield strength (6 15 percent), working range, and elo
19、ngation:MaterialWire Diameter Yield StrengthWorkingLoad, min, gfElongation,min, %in. (mm)Approximate Center LoadStress psi (Mpa) min, gf max, gfNickel-titanium-magnesiumalloy (UNS N03300)0.0015 (0.038) 74 000 (510) 51 67 17 80.0016 (0.041) 74 000 (510) 56 76 17 80.0017 (0.043) 70 500 (486) 62 84 17
20、80.0018 (0.046) 70 500 (486) 69 93 20 80.0019 (0.048) 70 500 (486) 76 104 20 100.0020 (0.051) 70 000 (483) 85 115 35 100.0025 (0.064) 68 500 (472) 130 175 60 100.0027 (0.069) 64 500 (445) 145 190 75 100.0030 (0.076) 63 500 (438) 175 235 90 150.0033 (0.084) 63 000 (434) 210 280 115 150.0035 (0.089) 6
21、3 000 (434) 235 315 135 200.0040 (0.102) 61 500 (424) 300 400 190 200.0045 (0.114) 60 000 (414) 370 500 250 200.0050 (0.127) 60 000 (414) 450 610 330 200.0055 (0.140) 60 000 (414) 550 745 400 200.0060 (0.152) 60 000 (414) 655 885 475 20Nickel-manganesealloy (UNS N02211)0.0020 (0.051) 59 600 (411) 70
22、 100 30 140.0025 (0.064) 58 400 (403) 110 150 50 140.0027 (0.067) 56 800 (392) 125 170 60 140.0030 (0.076) 56 600 (390) 150 210 80 180.0033 (0.084) 50 400 (347) 175 245 105 180.0035 (0.089) 50 400 (347) 200 270 120 180.004 (0.102) 51 000 (352) 250 340 170 220.0045 (0.114) 47 000 (324) 295 395 230 22
23、0.005 (0.127) 46 000 (317) 350 470 305 220.006 (0.152) 43 000 (296) 465 635 490 22Molybdenum 0.0008 (0.020) 120 000 (827) 24 34 1 80.0010 (0.025) 120 000 (827) 35 50 4 80.0012 (0.030) 118 500 (817) 50 70 6 80.0013 (0.033) 118 500 (817) 60 80 8 80.00133 (0.034) 118 500 (817) 65 85 8 80.00150 (0.038)
24、113 500 (782) 77 105 10 120.0017 (0.043) 113 500 (782) 95 135 15 120.0020 (0.051) 105 000 (724) 127 173 25 120.0025 (0.064) 101 000 (696) 191 259 40 150.0030 (0.076) 96 000 (662) 262 354 65 170.0033 (0.084) 96 000 (662) 317 429 80 170.0035 (0.089) 96 000 (662) 356 482 90 170.0040 (0.102) 96 000 (662
25、) 466 630 115 170.0045 (0.114) 96 000 (662) 589 797 145 170.0050 (0.127) 96 000 (662) 728 984 180 170.0055 (0.140) 96 000 (662) 880 1190 220 170.0060 (0.152) 96 000 (662) 1047 1417 260 17Nickel-molybdenum-ironalloy (UNS N10001)0.0016 (0.041) 92 000 (634) 70 95 40 10F 290 94 (2005)2CLASS IINoteWire s
26、upplied as Class II shall conform to the following requirements as to yield strength (6 15 percent), working range, and elongation:MaterialWire Diameter Yield StrengthWorkingLoad, min, gfElongation,min, %in. (mm)Approximate Center LoadStress psi (Mpa) min, gf max, gf0.0020 (0.051) 85 000 (586) 102 1
27、38 65 100.0025 (0.064) 85 000 (586) 160 215 110 100.0030 (0.076) 80 000 (552) 219 297 165 150.0033 (0.084) 80 000 (552) 272 368 205 150.0035 (0.089) 80 000 (552) 287 389 240 150.0040 (0.102) 80 000 (552) 371 503 320 200.0050 (0.127) 80 000 (552) 606 820 485 20Class IIINoteWire supplied as Class III
28、shall conform to the following requirements as to yield strength (610 %), working range, and elongation:MaterialWire Diameter Yield StrengthWorkingLoad, min, gfElongation,min, %in. (mm)Approximate Center LoadStress psi (Mpa) min, gf max, gfNickel-titanium-magnesiumalloy (UNS N03300)0.0015 (0.038) 74
29、 000 (510) 53 65 20 100.0016 (0.041) 74 000 (510) 59 73 25 100.0017 (0.043) 70 500 (486) 66 80 30 120.0018 (0.046) 70 500 (486) 72 89 35 120.0019 (0.048) 70 500 (486) 81 99 35 120.0020 (0.051) 70 000 (483) 90 110 45 150.0025 (0.064) 68 500 (472) 135 165 75 150.0027 (0.069) 64 500 (445) 150 185 90 15
30、Class IIINoteWire supplied as Class III shall conform to the following requirements as to yield strength (610 %), working range, and elongation:MaterialWire Diameter Yield StrengthWorkingLoad, min, gfElongation,min, %in. (mm)Approximate Center LoadStress psi (Mpa) min, gf max, gfNickel-titanium-magn
31、esiumalloy (UNS N03300)0.0030 (0.076) 63 500 (438) 185 225 120 150.0033 (0.084) 63 000 (434) 220 270 145 150.0035 (0.089) 63 000 (434) 250 305 170 200.0040 (0.102) 61 500 (424) 315 385 230 200.0045 (0.114) 60 000 (414) 390 480 310 200.0050 (0.127) 60 000 (414) 475 585 400 200.0055 (0.140) 60 000 (41
32、4) 580 710 485 200.0060 (0.152) 60 000 (414) 690 850 575 20Nickel-manganesealloy (UNS N02211)0.0020 (0.051) 59 600 (411) 75 95 40 140.0025 (0.064) 58 400 (403) 115 145 65 140.0027 (0.069) 56 800 (392) 130 165 80 140.0030 (0.076) 56 600 (390) 160 200 100 180.0033 (0.084) 50 400 (347) 190 235 125 180.
33、0035 (0.090) 50 400 (347) 210 260 145 180.0040 (0.102) 51 500 (355) 265 325 200 220.0045 (0.114) 47 500 (328) 310 380 265 220.0050 (0.127) 46 000 (317) 370 450 355 220.006 (0.152) 54 000 (372) 495 605 560 22Molybdenum 0.0008 (0.020) 120 000 (827) 25 33 1 80.0010 (0.025) 120 000 (827) 40 50 4 80.0012
34、 (0.030) 118 500 (817) 55 65 6 80.0013 (0.033) 118 500 (817) 65 75 8 80.00133 (0.034) 118 500 (817) 70 80 8 80.0015 (0.038) 113 500 (782) 82 100 10 120.0017 (0.043) 113 500 (782) 105 129 15 120.0020 (0.051) 96 000 (662) 135 165 25 150.0025 (0.064) 96 000 (662) 202 248 40 150.0030 (0.076) 96 000 (662
35、) 277 339 65 170.0033 (0.084) 96 000 (662) 336 410 80 170.0035 (0.089) 96 000 (662) 377 461 90 170.0040 (0.102) 96 000 (662) 493 603 115 170.0045 (0.114) 96 000 (662) 624 762 145 170.0050 (0.127) 96 000 (662) 770 942 180 170.0055 (0.140) 96 000 (662) 932 1139 220 170.0060 (0.152) 96 000 (662) 1109 1
36、355 260 17Nickel-molybdenum-ironalloy (UNS N10001)0.0016 (0.041) 92 000 (634) 76 92 45 15F 290 94 (2005)3Class IIINoteWire supplied as Class III shall conform to the following requirements as to yield strength (610 %), working range, and elongation:MaterialWire Diameter Yield StrengthWorkingLoad, mi
37、n, gfElongation,min, %in. (mm)Approximate Center LoadStress psi (Mpa) min, gf max, gf0.0020 (0.051) 85 000 (586) 109 133 75 150.0025 (0.064) 85 000 (586) 167 205 125 150.0030 (0.076) 80 000 (552) 232 284 185 200.0033 (0.084) 80 000 (552) 289 353 230 200.0035 (0.089) 80 000 (552) 305 373 270 200.0040
38、 (0.102) 80 000 (552) 394 482 360 200.0050 (0.127) 80 000 (552) 642 784 540 206. Dimensions and Permissible Variations6.1 The wire shall not vary from the specified diameter asdetermined by weight, by more than the amounts prescribed inTable 4. Center weights of various types of wire are given inTab
39、le 5.6.2 In the case of finished plated wires, the percentage ofplating shall be calculated on the basis of the bare wire weight.In specifying rod plated and drawn plated wire, the platingweight will be based on finished wire weight. Orders shallspecify the manner of plating.7. Surface7.1 Bare WireT
40、he surface of the wire shall be bright, andfree from cracks, slivers, fissures, lubricants, or other detrimen-tal defects as determined at a magnification of 103.7.2 Plated Wire The bare wire shall conform to therequirements specified in 7.1; the plating shall be free frombubbles, flakes, blisters,
41、porosity, and plating salts, and shallnot show peeled containing when tested in accordance with9.2.8. Chemical Analysis8.1 Chemical analysis of the material shall be made inaccordance with the methods described in the followingparagraphs (8.1.1 to 8.1.3):8.1.1 Nickel Alloy Wire (UNS N03300; UNS N022
42、11; UNSN10001)The chemical analysis shall be made in accordancewith either or both Test Methods E39and Test Methods E 107.The material may alternatively be analyzed in accordance withTest Method E 129.8.1.2 Molybdenum Wire The molybdenum content shallbe determined gravimetrically or by a combination
43、 of analysesfor impurities by spectrochemical and chemical methods.8.1.3 Tungsten Wire (UNS R07005)The tungsten contentshall be determined gravimetrically or by a combination ofanalyses for impurities by spectrochemical and chemical meth-ods.9. Test Methods9.1 Tensile PropertiesDetermine the yield s
44、trength, work-ing range, breaking strength, and elongation by using aconstant rate of traverse tester calibrated in terms of constantrate of traverse. Rate of traverse should be approximately 1 in.(25 mm)/min with a gage length of 10 in. (250 mm).9.2 Plate Adherence Draw the wire over a 0.10-in.(2.5
45、-mm) radius knife edge, holding the wire against the edgewith the thumb. Pull the wire at a 45 angle to the plane of theblade. In addition, draw the wire through a razor slit in a0.25-in. (6-mm) thick leather pad with the wire riding on thebottom of the slit with approximately 30 angle of approachTA
46、BLE 2 Chemical CompositionElement, percentNickel-Titanium-MagnesiumAlloy (UNS N03300)Nickel-ManganeseAlloy (UNS N02211)Molyb-denumTungsten(UNS R07005)Nickel-Molybdenum-Iron Alloy(UNS N10001)Limit Nominal Limit Nominal Limit Limit Limit NominalNickel 97.0 min 98.5 93.7 min 95.2 . . remainder 66.5Carb
47、on 0.4 max 0.25 0.20 max 0.10 . . 0.12 max 0.05Copper 0.25 max 0.03 0.25 max 0.05 . . . .Iron 0.60 max 0.10 0.75 max 0.15 . . 6.00 max 5.00Magnesium 0.20 min 0.35 . . . . . .0.50 max . . . . . . .Manganese 0.50 max 0.20 4.25 min 4.5 . . 1.00 max 0.455.25 max . . . . .Molybdenum . . . . 99.9 min . 33
48、.00 max 27.50Silicon 0.35 max 0.15 0.15 max 0.05 . . 1.00 max 0.45Sulfur 0.01 max 0.005 0.015 max . . . 0.030 max 0.012Titanium 0.20 min 0.40 . . . . . .0.60 max . . . . . . .Tungsten . . . . . 99.95 min . .Vanadium . . . . . . 0.60 min 0.25Phosphorus . . . . . . 0.040 max .Chromium . . . . . . 1.00
49、 max .Cobalt . . . . . . 2.50 max .F 290 94 (2005)4and a 30 angle of departure. Note the approach side of theleather belt and wire for flaking or peeling of plating.9.3 Weight Tolerance Determine size and uniformity inaccordance with Test Method F 205.9.4 Diameter ToleranceIf specified, measure diametertolerance by equipment calibrated as described in Test MethodsF16.9.5 DuctilityDetermine the ductility of tungsten and mo-lybdenum in accordance with Specification F 288 and Speci-fication F 289.9.6 Straightness Specify straightened wire by the radiu
